OSHKOSH - A 23-year-old former youth soccer coach faces three felony charges after what officials called "sexually inappropriate behavior" with students.

Fredrick Joseph Baier was charged Wednesday with causing a child older than 13 to view sexual activity, sexual assault of a student by school staff and second-degree sexual assault with the use of force.

Winnebago County Court Commissioner Bryan Keberlein issued a $15,000 cash bond and ordered Baier to have no contact with the Oshkosh Area School District, the Oshkosh United Soccer Club or anyone younger than 17 and to not drink alcohol.

"He befriended these kids in an unprofessional manner that drew him closer to them and put himself in their social life and in their social gatherings," Deputy District Attorney Scott Ceman told reporters after Wednesday's court hearing.

Ceman encouraged anyone who has information about the case or any other potential victims to contact the Oshkosh Police Department at 920-236-5700.

According to court documents, an Oshkosh West High School administrator contacted Oshkosh police to report Baier, a JV boys soccer coach at the school, had been buying team members alcohol and made sexual comments toward a female student athlete.

The 16-year-old student said Baier told her in October to add him on Snapchat, on which the two started chatting, court records state.

“There’s always room in my bed if you want a nap,” the girl recalled one message saying.

She also said Baier flirts with a lot of girls in the Oshkosh United Soccer Club, where he also was a coach.

As part of an Oshkosh police investigation, a 15-year-old girl reported Baier started sending her inappropriate content on Snapchat, starting in the spring, when she was 14, according to court documents. She said he asked her if she wanted to hang out and that if anything happened, not to tell anyone. He also sent her a sexually explicit photo of himself and asked her to send photos of herself in return.

Police arrested Baier Nov. 6 at his town of Black Wolf home. They said he admitted to buying a 19-year-old alcohol and having inappropriate conversations with at least three girls, one of whom he sent a sexually explicit photo.

Baier told investigators the 15-year-old had sent him a message saying she wanted to perform sexual acts on him, court records state.

A second 16-year-old told police that in late June or early July she was at a party at the 19-year-old’s home, when Baier came over, according to court documents. After a day of swimming and drinking, Baier started flirting with her, kissing her and trying to touch her inappropriately.

The girl told Baier she had a boyfriend and told him no, court documents state. She backed away from him and tripped, after which Baier helped her up, unzipped his pants and forced her to perform a sexual act on him. The girl pushed him off and kept telling him no, but Baier began having intercourse with her.

If convicted, Baier could face a maximum sentence of 52 years in prison. His next court appearance is scheduled for Nov. 21.